Respuesta :

haichoi0330

Answer:

y=15

x =40

Step-by-step explanation:

3x + 4y=180

and

(x+y+5)=4y

x+y+5=4y

x+5=4y-y

x+5=3y

x=3y-5

3x + 4y=180

3(3y-5) + 4y=180

9y-15 + 4y=180

9y+ 4y -15 =180

13y -15 =180

13y =180+15

13y =195

y =195÷13

y=15

3x + 4y=180

3x + 4(15)=180

3x + 60=180

3x =180 - 60

3x =120

x =120÷3

x =40

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